Pocketbook 611. Diagonal: 152.4 mm (6 "), Technology: E Ink VizPlex, Gray scale levels: 16 levels of grey. Document formats supported: CHM, DjVu, DOCX, ePub, FB2, FB2.ZIP, HTML, PDF, RTF, TCR, TXT, Image formats supported: BMP, JPG, PNG, TIF. Internal storage capacity: 2048 GB, Maximum memory card size: 32 GB, Internal RAM: 128 MB. Interface type: USB 2.0, USB connector type: micro USB A, Wireless LAN type: 802.11b, 802.11g, 802.11n. Processor clock speed: 800 MHz